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采用“3414”肥料效应试验设计方案进行田间试验,对紫云英氮、磷、钾肥效应以及肥料的交互作用进行了分析,并筛选出适宜的氮、磷、钾肥用量。结果表明:施用氮肥紫云英增产效果最好,鲜草增产量最高达21.1 t/hm2,增产率为158.6%;施用磷肥增产量为10.8 t/hm2,增产率为81.1%;而施用钾肥增产效果不显著。在本试验条件下,中磷、中钾水平最适宜氮肥肥效的发挥,中氮、中钾水平最适宜磷肥肥效的发挥,中氮、中磷水平最适宜钾肥肥效的发挥。通过肥料效应模型拟合,得到本试验条件下种植紫云英的肥料适宜用量为N 60.2 kg/hm2、P2O549.4 kg/hm2和K2O 64.2 kg/hm2。
The experiment of “3414” fertilizer effect experiment was carried out to conduct the field experiment. The interaction effects of nitrogen, phosphorus and potash fertilizers and fertilizers were analyzed and the suitable nitrogen, phosphorus and potassium fertilizers were screened out. The results showed that the best nitrogen application rate of Astragalus sinicus was that the yield of fresh grass was up to 21.1 t / hm2, the yield was 158.6%, the yield of phosphate fertilizer was 10.8 t / hm2, the yield was 81.1% The effect is not significant. Under the experimental conditions, the optimum medium-phosphorus and medium-potassium levels are the best for the efficiency of nitrogen fertilizers. The medium-nitrogen and medium-potassium levels are most suitable for the fertilizers to play a role, while the medium and medium phosphorus levels are most suitable for the efficiency of potassium fertilizers. According to the fertilizer effect model fitting, the suitable amount of fertilizer for the cultivation of Chinese milk vetch was N 60.2 kg / hm2, P2O549.4 kg / hm2 and K2O 64.2 kg / hm2.